Beating up device for looms

ABSTRACT

A device in which a reed in the form of disks with teeth freely mounted on a drive shaft, is provided with guide rings with one ring being arranged between two disks. The disks are positioned relative to each other so that their teeth define screw-type surfaces. Clearances are provided between the disks for separating plates, between which there are also clearances for the passage of warp threads.

United States Patent 1 Titov July 10, 1973 BEATING UP DEVICE FOR LOOMS [76] Inventor: Dmitry Vladimirovich Titov, l3

Parkovaya ulitsa, 27, korpus 2, kv. 49, Moscow, U.S.S.R.

22 Filed: Sept. 22, 1971 21 Appl. No. 182,657

[52] U.S. Cl. 139/188, 139/191, 139/12 [51] Int. Cl. D03d 49/60, D03d 41/00 [58] Field of Search 139/188, 191, 12

[56] References Cited UNITED STATES PATENTS 696,263 3/1902 Panitschek et a1 139/191 v 824,685 6/1906 Dalkranian i 139/191 2,251,337 8/1941, Libby 139/191 FOREIGN PATENTS OR APPLICATIONS 147,548 10/1962 U.S.S.R 139/12 U.S.S.R 139/12 570,196 12/1957 ltaly...... 139/188 116,965 5/1958 U.S.S,R 139/188 988,468 4/ 1965 Great Britain 139/188 1,408,893 7/1965 France 139/188 Primary ExaminerJames Kee Chi Attorney-Holman and Stern [57 ABSTRACT A device in which a reed in the form of disks with teeth freely mounted on a drive shaft, is provided with guide rings with one ring being arranged between two disks. The disks arepositioned relative to each other so that their teeth define screw-type surfaces. Clearances are provided between the disks for separating plates, between which there are also clearances for the passage of warp threads.

1 Claim, 2 Drawing Figures BEATING UP DEVICE FOR LOOMS BACKGROUND OF THE INVENTION The present invention relates to weaving machines, and more specifically to beating up devices used in these machines.

The present invention can be most advantageously employed in looms in which the warp threads form several sheds, with each of the sheds accommodating a weft thread carrier. However, the present invention can equally be used in ordinary looms, as well as in looms wherein the weft thread is inserted in the shed by a dummy shuttle, or by air tubes.

Prior Art Known in the prior art are beating up devices comprising a reed defined disks freely mounted on a drive shaft with a possibility of some transverse movement therealong, with each disk having teeth to beat up the weft thread to the fell of the fabric, and the disks being turned relative to one another so as to form a triplethreaded screw. Such devices also comprise stationary separating plates between which clearances are available for the passage of the warp threads, with each of these plates being mounted relative to the disk so that a clearance is formed between the plate and the top of the teeth, and stationary guide plates between which the disk is disposed with a minimum clearance, which plates enter the clearances between the separating plates, locate thedisks opposite said plates, and direct the weftthread carriers (see, for example, USSR Author's Certificate No.25004l, cl.86c, 17, dated 1962).

In the prior-art devices, the minimum clearnace between the diska nd the guide plates involves forces of friction therebetween, with these forces being overcome through additional power consumption, which is converted into useless heat and is spent for the wear of parts. Eliminating this phenomenon is possible by increasing the value of theclearance, which is achieved through a greater thickness of the separating plates as compared to that of the disks. However, increased thickness of the separating plates significantly complicates warpshedding. Besides, widening the clearance is also possible by decreasing the thickness of the disks.

However this .reduces the operating reliability of the disks and causes mechanical damaging of the warp and weft threads.

An object of the present invention is to overcome the aforementioned disadvantages.

Another object of the present invention is to provide a beating up device which reduces theforces of friction Summary of the Invention tween the separating plates to locate the disks opposite them, according to the invention, freely mounted on the drive shaft with a possiblity of some transverse movement therealong are rings arranged so that there is one ring between-two disks, and at least one ring between two guide platesQSuch design reduces the force of friction between the disks.

For a better appreciation of the invention considered below is a particular exemplary embodiment thereof with references to the appended drawings, wherein:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view partly in side elevation and partly in cross section of the beating up device according to the invention; and

FIG. 2 is'a plan view of the device illustrated in FIG. 1.

GENERAL DESCRIPTION OF THE DESIGN OF THE BEATING UP DEVICE The device comprises disks 2 (FIG. 1) freely mounted on a drive shaft 1 with a possibility of some transverse movement therealong. The disk 2 have teeth 3, 4, and 5 adapted to be positioned opposite stationary separating plates 6 and 7, and there are also provided stationary guide plates 8.

DETAILED DESCRIPTION OF THE DEVICE There are provided clearances between the plates 6 and 7, and each of these plates is disposed relative to a disk 2 with a minimum clearance formed between it and the top of the tooth 5. The plates 6 and 7 are mounted on rods 9, .10, and 11 through washers 12 by which they are tightened together. The bottom ends of the assembled plates are fixed in a base 13. Each plate 6 has a slot 14 to accommodate a carrier 15 of a weft thread 16 during its movement in the shed formed by warp threads 17 drawn between plates 6 and 7.

The disks 2 are mounted on the shaft 1 through a sliding square key 18. These disks are positioned relative to each other so that their teeth 3, 4, and 5 constitute screw-type surfaces serving to move the carrier 15 of the weft-thread l6, and to beat the weft thread up to fell 19 0f the fabric, with the movement of the weft thread 16 being effected by the tooth 3, and its beating up to the fell of fabric by the teeth 4 andS having'a greater height as compared to that of the tooth 3. The

moment the teeth 3 approach the weft thread 16' to the fell 19, such teeth together with the warp threads 17 tighten it, thus creating conditions for tensioning this thread. The teeth 4 also tighten thethread 16 together with the warp threads 17. Thus, when the teeth 5 are beating up thethread 16 it is in a tense condition, with a quality beat of this thread being therefore achieved.

The disk 2 is disposed in-between the guide plates 8 (FIG.2), with one end of each of these plates entering With these and other objects in view, in a beating up the clearance between the separating plates 6 and. 7, and being connected to these plates by a rod 20 (FIG. 1). The other ends of the plates 8 are, through washers 21 mounted on rods 22, and are fixed to-a stationary base 23. I

The plates 8 (FIG..2) serve for locating the disks 2 opposite the separating plates 6 and7, and for a uniform distribution of the teeth 5 at the time of beating up the weft thread 16.

To reduce friction between the disks 2, mounted on the drive shaft 1 with a possibility of some transverse displacement therealong are spacing guide rings 24 with one guide ring being arranged between two disks 2, as well as between two plates 8. However, the number of rings 24 between two plates 8 can be increased to further reduce the force of friction. In this case the rings 24 alternate with the disks 2.

OPERATION OF THE BEATING UP DEVICE The warp threads 17 are drawn between the top parts of the plates 6 and 7 as between an ordinary reed. These threads form a shed into which the carrier 15 with the weft thread 16 is delivered. As the disks 2 rotate in the direction shown by arrow A, the short tooth 3 sliding against a bevel of the carrier 15 displaces it in the shed and grips the weft thread 16 approaching it to the fabric fell 19, with the latter being widened. At this, time the second tooth 4, enters the shed section between the thread 17, and this shed is now closed. Following the' closed shed position, the threads 17 interlace the threads 16, tighten it, and form a new shed. The tooth 4 approaching the fabric fell 19 presses on the inserted weft thread 16. Owing to the greater height of the tooth 4 as compared to the tooth 3, it brings the thread 16 still nearer the fell 19 of the fabric. At this moment the tooth enters the shed section between the warp threads 17, crosses it, and approaches the thread 16. Due to its maximum height as compared to the teeth 3 and 4, the tooth 5 beats up the thread 16. Since the thread 16 is tightened by the warp threads 17 and teeth 4 and 3, it flexes during its beating and new shedding without feeding any additional length thereof, i.e. just due to its extension. Flexing of thread 16 involves its tension which flexes the thread 17. In such coaction of the warp and weft threads, a fabric of required structure is formed. As the disk teeth move in the shed along the warp threads, the latter are combed, thus helping fine shedding. The thread 16 is beaten up by the tooth 5 in another shed, into which another carrier 15 is introduced to lay down another weft thread 16, the operating cycle being resumed. Friction developed during the operation is reduced by the rings 24 rotating together with the disks 2. Friction occurs only from the side of the guide plates 8, the number of which is reduced on account of the rings 24.

I claim:

l. A beating up device for looms, comprising: a rotatable shaft; a reed defined by disks proveded with teeth freely mounted on said rotatable shaft with a possibility of some transverse movement therealong, said disks being turned relative to one another so that their teeth constitute screw-type surfaces serving to move a weft thread in a shed formed by warp threads; stationary separating plates arranged with clearances for the passage of the warp threads, each of said separating plates being mounted relative to each of said disks with a clearance also being provided between the separating plate and the tops of said disk teeth; stationary guide plates entering the clearances between said separating plates, and locating said disks opposite said separating plates; and guide rings freely mounted on said rotatable shaft with a possibility of some transverse movement therealong, said guide rings being arranged with one ring being located between each two of said disks, and at least one ring between each two guide. plates whereby friction developed during operation between the disks and guide plates is reduced by the rings rotating together with the disks.

* I! It 

1. A beating up device for looms, comprising: a rotatable shaft; a reed defined by disks proveded with teeth freely mounted on said rotatable shaft with a possibility of some transverse movement therealong, said disks being turned relative to one another so that their teeth constitute screw-type surfaces serving to move a weft thread in a shed formed by warp threads; stationary separating plates arranged with clearances for the passage of the warp threads, each of said separating plates being mounted relative to each of said disks with a clearance also being provided between the separating plate and the tops of said disk teeth; stationary guide plates entering the clearances between said separating plates, and locating said disks opposite said separating plates; and guide rings freely mounted on said rotatable shaft with a possibility of some transverse movement therealong, said guide rings being arranged with one ring being located between each two of said disks, and at least one ring between each two guide plates whereby friction developed during operation between the disks and guide plates is reduced by the rings rotating together with the disks. 